1,148. Tattooing

168:7 If a person makes anointing oil following the recipe given in the Torah, he is liable to the punishment of kareis (spiritual excision). If he did so by accident, he would have to bring a sin offering. This is assuming he made the oil for the purpose of anointing with it. If a person makes incense from the 11 ingredients detailed in the Torah - in their proper proportions, even if he only made a half or a third of total quantity - he is liable to kareis.  One who made it for educational purposes is exempt from punishment.

169:1 Leviticus 19:28 says that we may not print any marks on ourselves. This refers to tattoos, which are permanently etched into the skin so that they cannot be erased. These are made by scratching the skin and filling the place of the scratch with dye or ink that leaves a mark. If one  dyes the skin first and then scratches the place of the dye, he still violates a negative commandment. It is permitted to put ashes and other things on a wound for medicinal purposes even though doing so will leave a mark because the wound is already going to leave a mark anyway, which shows that the person's intention was not to make a tattoo.